Machine for



NJETERS. HOTO-LITNOGRAPHER WASHINGTON D C nnrrnn sTaTEs PATENT ernten SEWARD P. COBB, OF SOUTH DANVE-RS, VMASSAGHUSETTS MACH-INE FOR FINISHING LEATHER.

Specification of Letters Patent No. 28,562, dated .Tune 5, 1860.

To all whom 'it may concern:

Be it known that I, SEWARD I. COBB, of South Danvers, in the county of Essex and State of Massachusetts, have invented an Improved Machine for Finishing Leather; and I do hereby declare that the same is fully described and represented in the following specification and the accompanying drawings, of which- Figure l, is aside elevation; Fig. 2, a front elevation; Fig. 3, a transverse and central section of such machine. Fig. 4;, is a rear view of the vibrator and parts at its foot. Fig, 5, is a top View of the bed cams, their connections and operating screws.

In the drawings, A, exhibits a table, from and above which a frame B, extends and serves to support a vibrator, or vibratory arm, D, and a fly wheel, E. This arm supports the slicker or finishing tool, a, which in this machine is fastened to a tilting plate or frame, b, which at its front edge is hinged to what I term the carrier, c. This carrier slides freely in a longitudinal direction within the vibrator, D, and at or near its upper end is jointed to a forked connecting ro E, which straddles the vibrator and is jointed to the front side thereof as shown at d. Each joint pin e, of the carrier, c, projects through a slot, f, made in the vibrator as shown in Fig. l, the rear end of the connecting rod being applied to and so as to turn on a crank pin, g, extending from the side of the wheel. By revolving the wheel the vibrator with the carrier and finishing tool will not only have an oscillating motion imparted to them, but the carrier c, will be raised so as to lift and maintain the tool off the bed Gr over which it works, or a skin thereon driving the movement of the vibrator away from the iiy wheel, the tool being forced down upon the skin during the return movement of the vibrator.

Within the carrier, o, there is a short horizontal shaft It, which supports a sectoral lever, z'. This lever has its tail part .jointed to a connecting rod 7c, whose lower extends through a slot, m., (made in the vibrator) and has an arm orv lever, n, projecting from it as shown in the drawings. By means of such arm, n, shaft h, sectoral lever, z', and click, the angulary position of the tool relatively to the upper surface of the bed may be varied. It being difficult, if not impossible however, to accomplish this when the vibrator is in rapid motion. I have applied to the vibrator and its tilting plate, a mechanism, by which the tilting plate, while the vibrator may be in oscillation may be moved on its fulcrum so as to change the angle of the tool to the bed while the tool may be passing over any portion of a skin. As. a skin will often. be thicker in some parts than in others it become desirable to have some means by which the pressure or actionV of the finishingl tool may be equalizedf on the surface, and this while the said tool may be in movement.A

In order to accomplish this, I apply to the vibrator a slider, D, to slide thereon. From this slider, three projections p, Q, r, extend as shown in Figs. l, and 2. The lever, a, before described extends between the'projections, g, r, while the other projection p, is extended into the slot, s, of a long lever I, whose fulcrum, t, is supported by the frame B. The said lever, near its opposite end is pressed against the frame by a friction plate, u, held in place by screws, o, fv. By laying hold of the slotted lever and forcing it either downward or upward one of the pins, g, r, will be made to so act on the lever or arm, n, as to move the same and thereby change the angular position of the tilting plate or its tool relatively to the beds. Furthermore, the said bed as in various other leather or morocco finishing machines,

plays vertically within the table, A, and rests on the tops oftwo cams K, L, which in their turn are respectively supported on two other cams M, N. These latter cams are upheld by two vertical rods, O, O, each 'cam turning freely on its rod, but being supported on a shoulder a2, formed on the rod.

The two rods play vertically within a frame P, which supports springs, y, y, through which the rods respectively pass and on which they are sustained by means of screw nuts 2, 2, screwed on thel rods, the whole being as shown in the drawings. In this way the bed G, may be said to be supported on springs.

The touching surfaces of the two cams, K, M, or L, N, are helical in form. The two lower cams are connected on the same side each by a rod a', whose ends by means of joint pins are connected to .projections or flanches, b', b, of the lower cams, the same being such as to enable the two cams to move or turn simultaneously in the same direction, while the rod, a', may be moving lengthwise. The other two cams are similarly connected by a rod, 0, but the rod extends from one side of one cam to the `opposite side of the other.

Screw rods, d', c', are connected with the two rods a, c, respectively and screw through a stationary plate, f, and have cranks, g, 7Ll on their outer ends, the whole being so that by turning either crank a longitudinal movement shall be imparted to the rod, a', or c, with which the screw rod of the crank may be directly connected.A By revolving oneV crank, a vertical movement of the bed will be produced. By revolving the other, the bed may be tipped as occasion may require. Thus, by means of the mechanism directly below the bed, the vertical adjustment of opposite ends of the bed may be varied so as to either raise or depress both ends equally at the same time or unequally as circumstances may require.

I do not claim raising the finishing tool oi tDhet bed by means of the connecting rod,

I claim*Y l. In combination with the tool and the vibrator, a- Vmechanism.-substantially as described by which while the vibrator may be at rest or nearly so, the angular position of the finishing tool relatively to the bed may bevaried-as described,--such mechanism being the tilting plate, b, and its sectoral lever, c', and click applied to the vibrator and operated by a hand lever asspecified.

2. In combinationwith the tilting platerb, or tool holder and th'e vibrator, D, a mechan-v ism substantially as -described, by which, while the vibrator may be in motion, the tilt-V ing plate may be moved on itsfulcrum so as to changeits angle withvthe bed, such mechanism being the slider, 0, and the slotted lever, I, applied tothe vibrator, the arm, n,

and th'e frame of the machine in manner and so as to operate substantially as explained.

3. The combination and arrangement of the four cams K, L, M, N, their connections purposes as hereinbefore specified.

n S. P. COBB.

' and operating screws, the same being for the AA ALA- A 

